What percentages are there in life and what do they mean?

1, the weather forecast program on TV will report the weather and precipitation probability that night and tomorrow.

The probability of precipitation tonight is 20%.

2. Macro description of the experimental subjects when releasing the survey results.

For example, an experiment concluded that the IQ of people who often read short messages would drop 10%.

3. Used when calculating interest, tax and profit.

For example, the announcement issued by the central bank shows that since1October 24, the interest rates of RMB loans and deposits of financial institutions have been further lowered by 0.25 percentage points, 65,438. Among them, the one-year loan benchmark interest rate was lowered by 0.25 percentage point to 4.35%, and the one-year deposit interest rate was lowered by 0.25 percentage point to 1.5%.

4. Indicates the ability or possibility of something having a certain property.

For example, oil yield = oil quality/total physical quality × 100%, and germination rate = germination number/total number of seeds × 100%.

Extended data:

First, related concepts

Percent is a special fraction, the denominator is 100 and the numerator is not an integer. Percent indicates that one number is a percentage of another number, indicating a ratio. Percent is a way to express the numerical value of proportion, ratio or fraction, such as 82% for 82%, or 82/ 100, 0.82.

Percentages, also called percentages or percentages, are usually not written in the form of fractions, but expressed by percent signs (%), such as 4 1%, 1% and so on. Because the denominator of the percentage is 100, that is, 1% is the unit, so it is easy to compare. Percent only indicates the relationship between two numbers, so you can't add units after the percent sign.

Percent is a way to express the value of proportion, ratio or fraction, such as 82% for 82%, or 82/ 100, 0.82. Sum and discount represent a few tenths, such as "70%" and "30%", which represent 70/ 100 or 70% or 0.7 respectively. Therefore, the percentage cannot be followed by the unit.

Second, common fallacies.

1 and percentage are often proportional, but sometimes the percentage can exceed 100%.

For example, 20 13, the growth rate of WeChat usage reached 203%.

2. The nutritional reference value in the nutrient composition table on the food packaging box does not refer to the percentage of the substance in the food, but refers to the ratio of the content of the substance in the food to the average daily intake, which also explains why the sum of the percentages in the nutrient composition table is often not equal to 100%.

For example, if a normal person consumes 60 grams of fat every day, then a food containing 6 grams of fat per 100 grams should be marked as 10% instead of 6% in the nutrient composition table.

3. The percentage of individuals such as survival rate, germination rate, attendance rate, oil yield and scoring rate in the total amount will not exceed 100% (maximum 100%).

4. Percentage has different meanings in different situations. For example, the phrase "the probability of rain tonight is 20%" means that the probability of rain (snow) tonight is 20%, but it doesn't mean that it will rain (snow) 20% of the time tonight.

Baidu Encyclopedia-Percentage